Hi @eleaode
We regret for the inconvenience caused!
True Key Master Password provides access to the important information and passwords stored in your True Key app. If you forget your Master Password, you can become locked out of True Key and no longer have access to any of this information. Kindly refer the below article to to change or reset your True Key Master Password.
How to change or reset your True Key Master Password
Alternatively, You can always contact the chat support using below link for technical assistance.
McAfee Support
Regards,
Sudharsanam G